Plan b Restaurants are rolling out the much-talked about Impossible Burger in Fairfield, Milford, and Stamford this week. More than 100 U.S. restaurants including Bareburger franchises, already offer the juicy vegan burger created by plant-based food startup Impossible Foods.

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Their meat-like burger has gained popularity among plant-based food lovers who enjoy its meaty taste and texture. It owes much of its success to a vegetarian protein called heme that gives it the appearance of a beef patty and bleeds like real meat. It's seasoned with Plan b’s proprietary burger spice blend and then grilled.

Plan b chef Kevin Watson recommends trying it on a pretzel bun with spicy mustard, pickles and cheddar or Baja-style with avocado, jalapeños, jack cheese, and a spicy chipotle spread.

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“It’s unique and cutting-edge and keeps us on the forefront of culinary innovation,” Watson said.

The long-awaited burger will be on all Plan b menus by Dec. 22. Plan b has nine locations throughout Connecticut, Massachusetts, Virginia, and Washington, D.C.

All beef burgers on the Plan b menu can be substituted with the plant-based patty. In addition to its 12 beef burgers, Plan b already serves red-meat alternatives, including turkey, veggie and salmon.